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Texas Instruments MSP430FR5738IPW

Name: MSP430FR5738IPW
Brand: Texas Instruments
SKU: MSP430FR5738IPW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MSP430FR5738IPW

Manufacturer:: Texas Instruments

Category:: Microcontrollers

Package:: 28-TSSOP (0.173", 4.40mm Width)

Datasheet:: MSP430FR5738IPW.pdf

Description:: IC MCU 16BIT 16KB FRAM 28TSSOP

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Product details

Overview

MSP430FR5738IPW from Texas Instruments is a 16-bit ultra-low-power mixed-signal microcontroller featuring 16KB ferroelectric RAM (FRAM), 24-MHz CPU, 10-bit ADC with 6 external channels, 10-channel analog comparator, and dual eUSCI modules supporting UART/IrDA/SPI/I²C. It operates from 2 V to 3.6 V across –40°C to 85°C and targets battery-powered sensor nodes requiring nonvolatile memory endurance and fast write capability.

For engineers reviewing the MSP430FR5738IPW datasheet, MSP430FR5738IPW pinout, MSP430FR5738IPW application, or MSP430FR5738IPW equivalent, this page delivers verified functional specifications, TSSOP-28 package terminal mapping, FRAM-based low-power design trade-offs, and direct alternative options for industrial sensing and metering applications.

Technical Context

The MSP430FR5738IPW integrates a 16-bit CPUXV2 core with hardware multiplier and three-channel DMA, enabling deterministic real-time control in active mode (81.4 µA/MHz typical). Its FRAM architecture eliminates erase cycles, supports 125 ns/word writes, and provides 10¹⁵ write-cycle endurance with built-in ECC and MPU protection.

Peripherals include two eUSCI_A modules (UART/IrDA/SPI) and one eUSCI_B module (I²C/SPI), five 16-bit timers (three Timer_A and two Timer_B instances), RTC with calendar/alarm, and a 16-channel comparator with programmable hysteresis - all optimized for LPM3 (6.3 µA) and LPM3.5 (1.5 µA with crystal) operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	16-bit RISC CPUXV2 with 32-bit hardware multiplier and three-channel DMA for deterministic real-time math and data movement
FRAM Capacity	16 KB nonvolatile memory with 125 ns/word write speed, 10¹⁵ write endurance, and integrated ECC/MPU for code+data+storage consolidation
ADC Resolution	10-bit SAR ADC with 6 external + 2 internal input channels, 200 ksps sampling at 100 µA, internal reference, and sample-and-hold
Comparator Channels	10-channel analog comparator with voltage reference generation, programmable hysteresis, and 16 selectable inputs
Communication Interfaces	eUSCI_A0/A1: UART (auto-baud detect), IrDA, SPI; eUSCI_B0: I²C (multi-slave addressing), SPI - no external transceivers required
Supply Range	2.0 V to 3.6 V operation with integrated LDO, supply voltage supervisor, and zero-power brownout detection
Low-Power Modes	LPM3 standby: 6.3 µA (VLO); LPM3.5 RTC w/crystal: 1.5 µA; LPM4.5 shutdown: 0.32 µA - enabling multi-year battery life

Pinout & Package

TSSOP-28 (PW) package: 9.7 mm × 4.4 mm body, 0.65 mm pitch, exposed thermal pad recommended to be connected to DVSS.

Pin/Terminal	Circuit Role	Design Meaning
P1.0/TA0.1/DMAE0/RTCCLK/A0*/CD0/VeREF-	Port 1 bit 0 / Timer_A0 capture/compare / DMA trigger / RTC calibration output / ADC channel 0 / Comparator_D input 0 / Ref negative	Multi-function I/O supporting timer capture, real-time clock calibration, analog sensing, and reference voltage routing
P1.1/TA0.2/TA1CLK/CDOUT/A1*/CD1/VeREF+	Port 1 bit 1 / Timer_A0 capture/compare / Timer_A1 clock / Comparator_D output / ADC channel 1 / Comparator_D input 1 / Ref positive	Enables simultaneous analog measurement, PWM timing, and comparator feedback without external components
P1.2/TA1.1/TA0CLK/CDOUT/A2*/CD2	Port 1 bit 2 / Timer_A1 capture/compare / Timer_A0 clock / Comparator_D output / ADC channel 2 / Comparator_D input 2	Supports cascaded timer configurations and dual-role analog/digital signal conditioning
P1.3/TA1.2/UCB0STE/A3*/CD3	Port 1 bit 3 / Timer_A1 capture/compare / eUSCI_B0 SPI slave transmit enable / ADC channel 3 / Comparator_D input 3	Configurable as SPI slave control or analog input - critical for sensor interface flexibility
P1.4/TB0.1/UCA0STE/A4*/CD4	Port 1 bit 4 / Timer_B0 capture/compare / eUSCI_A0 SPI slave transmit enable / ADC channel 4 / Comparator_D input 4	Enables synchronized sensor readout via SPI while maintaining precise timing via Timer_B
P1.5/TB0.2/UCA0CLK/A5*/CD5	Port 1 bit 5 / Timer_B0 capture/compare / eUSCI_A0 SPI clock / ADC channel 5 / Comparator_D input 5	Provides master/slave SPI clocking and analog input on same pin - reduces PCB routing complexity
PJ.0/TDO/TB0OUTH/SMCLK/CD6	JTAG test data output / Timer_B0 output high-impedance control / SMCLK output / Comparator_D input 6	Shared debug, clock distribution, and analog monitoring function - simplifies test and timing architecture
PJ.1/TDI/TCLK/TB1OUTH/MCLK/CD7	JTAG test data input / test clock / Timer_B1 output high-impedance control / MCLK output / Comparator_D input 7	Combines boundary-scan debugging, system clock output, and analog monitoring in single pin
PJ.2/TMS/TB2OUTH/ACLK/CD8	JTAG test mode select / Timer_B2 output high-impedance control / ACLK output / Comparator_D input 8	Unifies JTAG control, low-frequency clock distribution, and analog input - essential for low-power timing systems
PJ.3/TCK/CD9	JTAG test clock / Comparator_D input 9	Dedicated debug clock with secondary analog monitoring role - maintains debug integrity during sensor operation
RST/NMI/SBWTDIO	Reset / non-maskable interrupt / Spy-Bi-Wire test data I/O	Single-pin debug interface enables programming and reset without full JTAG header - saves board space
TEST/SBWTCK	Spy-Bi-Wire test clock	Enables low-pin-count in-circuit debugging and programming - critical for compact TSSOP-28 designs
AVCC / AVSS / DVCC / DVSS	Analog and digital power/ground rails	Separate analog/digital supplies reduce noise coupling - mandatory for 10-bit ADC accuracy
PJ.4/XIN / PJ.5/XOUT	LFXT crystal oscillator input/output	Supports 32-kHz crystal for RTC - enables sub-µA real-time timekeeping with calendar and alarm

Key Features

Feature	Design Value
FRAM nonvolatile memory	16 KB unified memory space enabling instant write, infinite endurance, and elimination of flash erase delays - ideal for data logging in intermittent power environments
Ultra-low-power RTC	1.5 µA operation in LPM3.5 with 32-kHz crystal provides calendar, alarm, and time-stamped event capture without waking CPU
Hardware CRC engine	16-bit cyclic redundancy checker accelerates firmware validation and data integrity checks - offloads CPU during boot and communication
Integrated LDO regulator	Fully integrated low-dropout regulator enables single-supply operation from 2–3.6 V - removes need for external voltage regulation
Three enhanced USCI modules	eUSCI_A0/A1 (UART/IrDA/SPI) and eUSCI_B0 (I²C/SPI) support concurrent wired protocols - eliminates external level shifters or protocol converters
Programmable comparator hysteresis	Configurable hysteresis on 10-channel comparator prevents false triggering in noisy industrial environments - no external RC networks required

Applications

Smart Utility Metering	Wireless Sensor Node
Use Scenario: Battery-powered electricity/water/gas meters collecting consumption data hourly and transmitting via LPWAN. IC Role / Device Role / Timing Role: Primary controller managing ADC sampling, FRAM-based data buffering, RTC-triggered wake-up, and UART/I²C communication to RF module. Use Value: 16 KB FRAM stores 30+ days of timestamped readings; LPM3.5 RTC draws only 1.5 µA; integrated LDO simplifies power design.	Use Scenario: Remote environmental monitor measuring temperature, humidity, and CO₂ using analog sensors and reporting via BLE or LoRa. IC Role / Device Role / Timing Role: Central MCU acquiring analog signals via 10-bit ADC, processing thresholds with 10-channel comparator, and scheduling transmissions via RTC alarm. Use Value: Comparator hysteresis rejects EMI in unshielded enclosures; 125 ns FRAM writes log events instantly during brownout; dual eUSCI handles sensor I²C and radio UART.
Industrial Asset Monitor	Home Automation Hub
Use Scenario: Vibration and temperature monitor attached to motors or pumps, detecting anomalies and triggering alerts. IC Role / Device Role / Timing Role: Real-time signal acquisition using Timer_B for precise sampling intervals, FRAM storage of waveform snippets, and UART diagnostics output. Use Value: Hardware multiplier enables FFT preprocessing in active mode; 6.3 µA LPM3 allows continuous background monitoring; 10¹⁵ FRAM writes outlast equipment lifetime.	Use Scenario: Central hub aggregating Zigbee/Z-Wave sensor data, running local automation rules, and syncing with cloud via Wi-Fi module. IC Role / Device Role / Timing Role: Low-power coordinator managing multiple I²C sensor interfaces, RTC-based scheduling, and UART bridge to host processor. Use Value: eUSCI_B0 supports multi-slave I²C addressing for 10+ sensors; FRAM retains rule sets across power loss; 24-MHz CPU handles local decision logic without latency.

Smart Utility Metering

Wireless Sensor Node

Use Scenario: Battery-powered electricity/water/gas meters collecting consumption data hourly and transmitting via LPWAN.

IC Role / Device Role / Timing Role: Primary controller managing ADC sampling, FRAM-based data buffering, RTC-triggered wake-up, and UART/I²C communication to RF module.

Use Value: 16 KB FRAM stores 30+ days of timestamped readings; LPM3.5 RTC draws only 1.5 µA; integrated LDO simplifies power design.

Use Scenario: Remote environmental monitor measuring temperature, humidity, and CO₂ using analog sensors and reporting via BLE or LoRa.

IC Role / Device Role / Timing Role: Central MCU acquiring analog signals via 10-bit ADC, processing thresholds with 10-channel comparator, and scheduling transmissions via RTC alarm.

Use Value: Comparator hysteresis rejects EMI in unshielded enclosures; 125 ns FRAM writes log events instantly during brownout; dual eUSCI handles sensor I²C and radio UART.

Industrial Asset Monitor

Home Automation Hub

Use Scenario: Vibration and temperature monitor attached to motors or pumps, detecting anomalies and triggering alerts.

IC Role / Device Role / Timing Role: Real-time signal acquisition using Timer_B for precise sampling intervals, FRAM storage of waveform snippets, and UART diagnostics output.

Use Value: Hardware multiplier enables FFT preprocessing in active mode; 6.3 µA LPM3 allows continuous background monitoring; 10¹⁵ FRAM writes outlast equipment lifetime.

Use Scenario: Central hub aggregating Zigbee/Z-Wave sensor data, running local automation rules, and syncing with cloud via Wi-Fi module.

IC Role / Device Role / Timing Role: Low-power coordinator managing multiple I²C sensor interfaces, RTC-based scheduling, and UART bridge to host processor.

Use Value: eUSCI_B0 supports multi-slave I²C addressing for 10+ sensors; FRAM retains rule sets across power loss; 24-MHz CPU handles local decision logic without latency.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power FRAM microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MSP430FR5739IPW	Same TSSOP-28 package; 12 external ADC channels (vs. 6), 16 comparator inputs (vs. 10), 32 GPIO (vs. 17)	Required when higher analog channel count or more I/O for multi-sensor systems is needed	Select MSP430FR5739IPW if expanding sensor count beyond 6 analog inputs or needing >17 GPIO without redesign
MSP430FR5969IPM	24-MHz FRAM MCU in 48-pin QFN; 64 KB FRAM, 2 KB RAM, 12-bit ADC, 16-channel comparator, 40 GPIO	Targeted at complex edge-processing tasks requiring larger memory, higher-resolution ADC, or more peripherals	Choose MSP430FR5969IPM for next-generation designs needing scalability, enhanced analog performance, or future-proof memory headroom

Compared with MSP430FR5739IPW, the MSP430FR5738IPW reduces analog channel count and GPIO to fit compact TSSOP-28 layouts while retaining identical FRAM endurance, RTC precision, and ultra-low-power modes - making it optimal for cost- and space-constrained metering. Against MSP430FR5969IPM, it trades memory size and resolution for lower BOM cost and smaller footprint in established low-complexity deployments.

Availability

MSP430FR5738IPW is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial asset monitors, and home automation hubs requiring stable component supply and long-term lifecycle support.

Supply support for MSP430FR5738IPW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions for industrial, automotive, and consumer applications.

The MSP430FR57xx product line was designed specifically for ultra-low-power sensing and system management in battery-operated building automation, smart grid infrastructure, and industrial monitoring systems.

FAQ

What is the maximum operating frequency of the MSP430FR5738IPW?

The MSP430FR5738IPW features a 16-bit CPUXV2 core with a maximum system clock frequency of 24 MHz. This frequency is achieved using the factory-trimmed DCO oscillator or external HFXT crystal. The device maintains full functionality across its specified supply range (2.0 V to 3.6 V) and temperature range (–40°C to 85°C), with timing parameters validated up to 24 MHz in the official SLAS639L datasheet.

Does the MSP430FR5738IPW support hardware UART with automatic baud-rate detection?

Yes, the MSP430FR5738IPW supports hardware UART with automatic baud-rate detection through its eUSCI_A0 and eUSCI_A1 modules. This feature enables robust communication with variable-speed hosts without prior configuration, reducing firmware overhead. The capability is documented in Section 5.24 of the SLAS639L datasheet and applies directly to the MSP430FR5738IPW in all supported packages including TSSOP-28.

How many analog input channels does the MSP430FR5738IPW ADC support?

The MSP430FR5738IPW integrates a 10-bit ADC (ADC10_B) with 6 external analog input channels (A0–A5) plus 2 internal channels (temperature sensor and VMID). This configuration is confirmed in Table 3-1 of the SLAS639L datasheet under the MSP430FR5738 row and applies specifically to the PW package variant. Devices in RGE and YQD packages share the same 6+2 channel count.

What is the FRAM endurance specification for the MSP430FR5738IPW?

The MSP430FR5738IPW provides 10¹⁵ write cycle endurance for its 16 KB FRAM memory. Unlike flash, FRAM requires no erase cycles and supports 125 ns per word writes. This endurance rating is specified in the "Features" section of the SLAS639L datasheet and applies uniformly across all MSP430FR5738 variants, including the MSP430FR5738IPW in TSSOP-28 packaging.

Can the MSP430FR5738IPW operate from a single 3.3-V supply?

Yes, the MSP430FR5738IPW operates over a supply range of 2.0 V to 3.6 V, fully supporting standard 3.3-V systems. Its integrated LDO regulator ensures stable core voltage across this range, and all I/O pins are 3.3-V tolerant. The device maintains specified performance - including 24-MHz operation, 10-bit ADC accuracy, and ultra-low-power modes - at 3.3 V, as verified in Section 5.3 (Recommended Operating Conditions) of the SLAS639L datasheet.

MSP430FR5738IPW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 28-TSSOP (0.173", 4.40mm Width)

Series:: MSP430™ FRAM

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Core Processor:: MSP430 CPUXV2

Core Size:: 16-Bit

Speed:: 24MHz

Connectivity:: I2C, IrDA, LINbus, SCI, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O:: 21

Program Memory Size:: 16KB (16K x 8)

Program Memory Type:: FRAM

EEPROM Size:: -

RAM Size:: 1K x 8

Voltage - Supply (Vcc/Vdd):: 2V ~ 3.6V

Data Converters:: A/D 10x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

MSP430FR5738IPW FAQ

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6.How does Aetrix verify that MSP430FR5738IPW is sourced from the original manufacturer or authorized distributors?

All MSP430FR5738IPW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MSP430FR5738IPW meets industry standards.

7.What is the process for return or replacement of MSP430FR5738IPW?

All MSP430FR5738IPW units undergo pre-shipment inspection (PSI). If there is an issue with MSP430FR5738IPW, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MSP430FR5738IPW part is unused and in its original packaging.

Return procedure for MSP430FR5738IPW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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